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Do not use the redundant BestInvalidWork record in the block database.

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As block index entries have a flag for marking invalid blocks, the
'best invalid work' information can be derived from there. In addition,
remove the global from main.h
This commit is contained in:
Pieter Wuille 2013-10-13 22:15:48 +02:00
parent ede3ee3348
commit 85eb2cef33
4 changed files with 13 additions and 21 deletions
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26
src/main.cpp
View File

@ -33,7 +33,7 @@ unsigned int nTransactionsUpdated = 0;
map<uint256, CBlockIndex*> mapBlockIndex;
CChain chainActive;
uint256 nBestInvalidWork = 0;
CBlockIndex *pindexBestInvalid;
set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexValid; // may contain all CBlockIndex*'s that have validness >=BLOCK_VALID_TRANSACTIONS, and must contain those who aren't failed
int64 nTimeBestReceived = 0;
int nScriptCheckThreads = 0;
@ -1349,7 +1349,7 @@ void CheckForkWarningConditions()
if (pindexBestForkTip && chainActive.Height() - pindexBestForkTip->nHeight >= 72)
pindexBestForkTip = NULL;
if (pindexBestForkTip || nBestInvalidWork > chainActive.Tip()->nChainWork + (chainActive.Tip()->GetBlockWork() * 6).getuint256())
if (pindexBestForkTip || (pindexBestInvalid && pindexBestInvalid->nChainWork > chainActive.Tip()->nChainWork + (chainActive.Tip()->GetBlockWork() * 6).getuint256()))
{
if (!fLargeWorkForkFound)
{
@ -1416,10 +1416,13 @@ void CheckForkWarningConditionsOnNewFork(CBlockIndex* pindexNewForkTip)
void static InvalidChainFound(CBlockIndex* pindexNew)
{
if (pindexNew->nChainWork > nBestInvalidWork)
if (!pindexBestInvalid || pindexNew->nChainWork > pindexBestInvalid->nChainWork)
{
nBestInvalidWork = pindexNew->nChainWork;
pblocktree->WriteBestInvalidWork(CBigNum(nBestInvalidWork));
pindexBestInvalid = pindexNew;
// The current code doesn't actually read the BestInvalidWork entry in
// the block database anymore, as it is derived from the flags in block
// index entry. We only write it for backward compatibility.
pblocktree->WriteBestInvalidWork(CBigNum(pindexBestInvalid->nChainWork));
uiInterface.NotifyBlocksChanged();
}
LogPrintf("InvalidChainFound: invalid block=%s height=%d log2_work=%.8g date=%s\n",
@ -2769,6 +2772,8 @@ bool static LoadBlockIndexDB()
pindex->nChainTx = (pindex->pprev ? pindex->pprev->nChainTx : 0) + pindex->nTx;
if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS && !(pindex->nStatus & BLOCK_FAILED_MASK))
setBlockIndexValid.insert(pindex);
if (pindex->nStatus & BLOCK_FAILED_MASK && (!pindexBestInvalid || pindex->nChainWork > pindexBestInvalid->nChainWork))
pindexBestInvalid = pindex;
}
// Load block file info
@ -2777,11 +2782,6 @@ bool static LoadBlockIndexDB()
if (pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile))
LogPrintf("LoadBlockIndexDB(): last block file info: %s\n", infoLastBlockFile.ToString().c_str());
// Load nBestInvalidWork, OK if it doesn't exist
CBigNum bnBestInvalidWork;
pblocktree->ReadBestInvalidWork(bnBestInvalidWork);
nBestInvalidWork = bnBestInvalidWork.getuint256();
// Check whether we need to continue reindexing
bool fReindexing = false;
pblocktree->ReadReindexing(fReindexing);
@ -2791,12 +2791,10 @@ bool static LoadBlockIndexDB()
pblocktree->ReadFlag("txindex", fTxIndex);
LogPrintf("LoadBlockIndexDB(): transaction index %s\n", fTxIndex ? "enabled" : "disabled");
// Load hashBestChain pointer to end of best chain
// Load pointer to end of best chain
chainActive.SetTip(pcoinsTip->GetBestBlock());
if (chainActive.Tip() == NULL)
return true;
// register best chain
LogPrintf("LoadBlockIndexDB(): hashBestChain=%s height=%d date=%s\n",
chainActive.Tip()->GetBlockHash().ToString().c_str(), chainActive.Height(),
DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()).c_str());
@ -2882,7 +2880,7 @@ void UnloadBlockIndex()
mapBlockIndex.clear();
setBlockIndexValid.clear();
chainActive.SetTip(NULL);
nBestInvalidWork = 0;
pindexBestInvalid = NULL;
}
bool LoadBlockIndex()

1
src/main.h
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@ -74,7 +74,6 @@ extern CScript COINBASE_FLAGS;
extern CCriticalSection cs_main;
extern std::map<uint256, CBlockIndex*> mapBlockIndex;
extern std::set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexValid;
extern uint256 nBestInvalidWork;
extern unsigned int nTransactionsUpdated;
extern uint64 nLastBlockTx;
extern uint64 nLastBlockSize;

6
src/txdb.cpp
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@ -74,13 +74,9 @@ bool CBlockTreeDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
return Write(make_pair('b', blockindex.GetBlockHash()), blockindex);
}
bool CBlockTreeDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
{
return Read('I', bnBestInvalidWork);
}
bool CBlockTreeDB::WriteBestInvalidWork(const CBigNum& bnBestInvalidWork)
{
// Obsolete; only written for backward compatibility.
return Write('I', bnBestInvalidWork);
}

1
src/txdb.h
View File

@ -35,7 +35,6 @@ private:
void operator=(const CBlockTreeDB&);
public:
bool WriteBlockIndex(const CDiskBlockIndex& blockindex);
bool ReadBestInvalidWork(CBigNum& bnBestInvalidWork);
bool WriteBestInvalidWork(const CBigNum& bnBestInvalidWork);
bool ReadBlockFileInfo(int nFile, CBlockFileInfo &fileinfo);
bool WriteBlockFileInfo(int nFile, const CBlockFileInfo &fileinfo);